//forest prototype v2

float treeNum = 0;
float a50 =70;
float a210 =200;
float shade = 175;
float len = 60;
float x = 100;

void setup(){
size(640,480);
}

void draw(){
  drawForest();        //why won't this redraw?
  fill(255);
  stroke(0);
  rect(x,100,100,100);
  x=x+2;
}
  

void drawTree(float treeX, float treeY, float trans, float lenin){
  a50 =70;
  a210 =200;
  rectMode(CORNER);
  noStroke();
  fill(139,69,19);
  rect(treeX-5, treeY-a50, 10, lenin);
  fill(34,139,34);
  quad(treeX-50, treeY-a50, treeX-25, treeY-100, treeX+25, treeY-100, treeX+50, treeY-a50);
  quad(treeX-40, treeY-100, treeX-15, treeY-150, treeX+15, treeY-150, treeX+40, treeY-100);
  triangle(treeX-30, treeY-150, treeX+30, treeY-150, treeX, treeY-a210);
  noStroke();           //MASK
  fill(0,trans);
  rect(treeX-5, treeY-a50, 10, lenin);
  quad(treeX-50, treeY-a50, treeX-25, treeY-100, treeX+25, treeY-100, treeX+50, treeY-a50);
  quad(treeX-40, treeY-100, treeX-15, treeY-150, treeX+15, treeY-150, treeX+40, treeY-100);
  triangle(treeX-30, treeY-150, treeX+30, treeY-150, treeX, treeY-a210);
}

void drawForest (){
  while (treeNum <= 40){
      drawTree(random(0,width),250, shade, len);
      a50 =a50-0.5;
      a210 =a210+.5;
      shade = shade -3;
      treeNum=treeNum+1;
      len = len + 1;
  }
}